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Message-ID: <20121206144821.GC18547@quack.suse.cz> Date: Thu, 6 Dec 2012 15:48:21 +0100 From: Jan Kara <jack@...e.cz> To: Henrik Rydberg <rydberg@...omail.se> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, mgorman@...e.de, linux-mm@...ck.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Oops in 3.7-rc8 isolate_free_pages_block() On Thu 06-12-12 10:17:44, Henrik Rydberg wrote: > Hi Linus, > > This is the third time I encounter this oops in 3.7, but the first > time I managed to get a decent screenshot: > > http://bitmath.org/test/oops-3.7-rc8.jpg > > It seems to have to do with page migration. I run with transparent > hugepages configured, just for the fun of it. > > I am happy to test any suggestions. Adding linux-mm and Mel as an author of compaction in particular to CC... It seems that while traversing struct page structures, we entered into a new huge page (note that RBX is 0xffffea0001c00000 - just the beginning of a huge page) and oopsed on PageBuddy test (_mapcount is at offset 0x18 in struct page). It might be useful if you provide disassembly of isolate_freepages_block() function in your kernel so that we can guess more from other register contents... Honza Honza -- Jan Kara <jack@...e.cz> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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